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प्रश्न
Explain how the speed of sound can be determined by the method of echo.
थोडक्यात उत्तर
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उत्तर
Sound produced from a position at a specified distance d, at least 50 m from the reflecting surface, is required to calculate the speed of sound in the air. A stopwatch records the amount of time that passes before the echo leaves the source of the sound. The following formula is then used to determine the speed of sound.
V = `"total distance travelled" / "time interval"` = `(2d)/t m//s`
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